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Internal Heated Fluidized Bed Dryer

Working Principle:
Preheated gas (air) is passed into the product layer under controlled velocity after being uniformed by the distributor so as to create a fluidized state. Fluidized bed dryer with in-bed heat exchanger is superior in an advanced drying technique combined with normal fluidized bed drying and indirect conduction type drying. The in-bed heat exchanger enhances heat transfer of solid particles and thermal medium and improves drying efficiency and drying capacity. 



Characteristics:
1. Efficiency in energy saving is high. Most heat is provided by the in-bed heat exchanger with the efficiency about 90%, hot air is used mainly to ensure normal fluidization, the quantity of hot air is much less than that needed by conventional fluidized bed; power consumption and heat losses of the exhaust air are accordingly reduced, resulting in higher drying efficiency.
2. As gas flow velocity in the system is lower than that in the conventional fluidized bed, so the material being entrained from the fluidized bed by the air is reduced significantly, the load of the dedusting system is reduced and the environmental protection is improved correspondingly.
3. Use of a special air distributor to prevent material leaking.
4. Easy to install, simple to operate, inexpensive to maintain.


Material to be dried:

Ethane diacid, calcined soda, table salt, sodium carbonate, sodium sulphate, potassium chloride, nitrate of potash, ammonium chloride, ABS plastic, styrene, ammonium nitrate, ammonium sulfate, calcium chloride, calcium formyl, calcium hypochlorite, calcium sulphate, coal, crystal sugar, diamine phosphate, calcium phosphate, grain porcelain clay, grain fertilizer, hydroquinone, iron sulfate, emulsoid resin, pentaerythritol, potassium carbonate, potassium chlorate, potassium phosphate, potassium tartrate, steel scrap, PVC, sludge, baking soda, sodium bromide, sodium carbonate, sodium chlorate, sodium formate, amylum, terephthalic acid and etc.


Technical Parameter:


SpecificationWater Evaporation Capability (kg/h)Installed Power (kw)Steam Pressure (Mpa)Steam Consumption (kg/h)Input Air (m3/h)Inlet Air Temperature (℃)Size(Length×Width×Height)
GWLN2.0200-500670.2-1.2400-12007200100-3503000×1200×4500
GWLN2.5300-600770.2-1.2600-12009000100-3503400×1300×4500
GWLN3.0400-800960.2-1.2800-140010800100-3503800*1400*4500
GWLN3.6500-9001120.2-1.21000-200012960100-3504200*1500*4500
GWLN4.0500-9001300.2-1.21200-200015800100-3504800×1500×4500
GWLN5.0700-11001450.2-1.21400-220018700100-3505200×1650×5000
GWLN6.0800-14001600.2-1.21600-280021600100-3506000×1700×5000
GWLN7.0900-16001800.2-1.21800-320025200100-3506800×1750×5000
GWLN8.01000-14002000.2-1.22000-280028800100-3507500×1800×5000
GWLN10.01200-18002600.2-1.22400-360036000100-35010000×1850×6000
GWLN15.01600-22003500.2-1.23200-440054000100-35014000×1900×6500
GWLN20.02000-30004000.2-1.24000-600072000100-35018000×2000×7000
GWLN25.02800-40005500.2-1.25500-650090000100-35022000×2000×7000



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MAIN INTRODUCTION

Internal heated fluidized bed is a new drying technology developed on the basis of conventional fluidized bed drying and indirect heating drying. It immerses a tube heat exchanger in the fluidized drying material, and the heat required for material dehydration is provided by a buried heat exchanger and the hot air for fluidization. It is widely used for drying and cooling of refined salt, soda ash, sodium percarbonate, anhydrous sodium sulphate and other materials, is a high-efficiency and energy-saving dryer.